The Earl Rebecca family is known as a family of alchemists. Sasha Rebecca, the second daughter of Earl Rebecca, was the child of a concubine, and as a result, she grew up neglected. However, Sasha learned alchemy as a member of the Rebecca family, believing that one day she would be recognized for her efforts. Fortunately, Sasha had a natural talent for alchemy, but all the credit for her work was taken by her sister, who hated her.Such days went on and on. Then, on the day Sasha turned 15 years old, Sasha was disowned by her father, who told her that the Earl Rebecca family did not need a failure.Sasha was at her wit's end, with nowhere to go, when she is offered a job at the Royal Library to help her family....